Lifting-jack.



PATENTE!) MAY 12, 1908.

J. H.' BURKHOLDBR.

LIPTING JACK.

Primo/max rum? rms; 7, 190s,

Z I YW..

li l? J Cri-XN iii. BURKE@ if? To (AZZ whom ir 'm fry Cof/mem:

Be it known that i, Jaim H.. i ciizeri of thi# Uriiri S Ashland, iii the comit? rshl EUR KHG-LEDER,

V of Ohio',- hm/se iriventei ful improvements in dec-lars that the follm exact description of fi enable Qihers skilled in rh@ nppermiils in malra- :mu use i My imferiiori reiiitss tu lifting j the invention cmisisls iii ih, and combinaionii prirs shmwii :md described and 0d Gut in die Claims. i

in the :icoolripziiiyirig a v 'erticzil secti'iuzl elw-:Mii Fig, 2 is :i side elevation .i i pirspoctive detail of rire ring spri h pluyed in the device ns lirirrins'lei' iullif scribed, :md Fig. 4 is :i longiudirizil seaman of the operating lever. s*

The jack as thus shown comprises a tubuhir standard A, adjusting screw B, ruiter gears A(j und D und lever handle ii, The standard fi has opposite limb Ludin :il bmoves or channels 2 inside open 'friuli their Lottum and tfrinimitinff at a stop i milder 3 :it their upper enils, and slffrew i' ms i pin i throuvh its lwwfr 0nd with ils Grids engaged in sai(I grooves and limited in its travel' hy shoulders 3 and serving` to guide the screw in straight lines. The siiid s is adapted in heinsvrtful only fhrough the lo @rid si the standard and hss :i head 5 i'e.ri10v'il ly fixer herwn alter bring puiy in 15h@ s* ,Llard. Miter gem' U also is iirmzdml umrf. i" from over 'the stuiid rd lrsforc. hrm; A in place und sifrvis an iii iriz''mid hmirizig, und n 11m-'el iesiire @i he jack .Ins thus construcml is i'he arrangement wi" saidE gom' with respect to the srarulard and the screw, ns shown. Thus, it will im seen, than thv said geur servos iwi; only i i "l l l i l l l i l E, residing V l hom mi e This, said haring l d in a, lios@ l b S ,Y Handle is om.: .ts W urli, s0 ihm: in in rh@ hd: or el ip mummy wie@ t ver occurs to taire ii.

ar action of @lie le 'tion and grip for pziwi. fr@ The buss@ a fiirist whish gear D hears @mi iii which s ind e E is fixed is aniiulsr'wul @i sufficient c vp'h to afford 21 support haar ing for on@ half of lever ii m while ih@ nher half iigaiges on the i gg, sirirl gear en the outside fcheroi. T lever has i main Dorin with n engage on the said mili, find im stir-,cl3

mrtiwri h wih an cyr; 9 to lwss 6, thus dividing lie' he f iiin 0i" said lcvsr hewfesrx his @xterm reducing tends ruimte-e gear i? Wham the le is str-fiks. A dir-g nr darihic p T un gii'vn if) hweri sind has a coiled piish spring '0 therewith and zidiipted to heid ii in position 0i adjustment according is the parte :irri to he 'nperasilI one may or th@ orlisr. Said pawfi engages the omer @mis ii um with un grani ll'hzffri claim is:

i, in iiiiingjncl-zs, a sri'iidr i llwriin, 'amil if. romhhvfd @mi ir mmiiid im se'iid screw i mi lhal iiiiiiisdizit@ op il?. fami hfe sirmr lwiirg iidirprfl t@ la "gi imc. diii'r. iti :mid stand; rd iiiilcirridiutly of other i ris, wiwi-@hy pusy mid r'xid adjustmeus si" ihr svrvw muy hc irliecbid, c iirihiilrd with. im

zi lwrol fluir and lever and ratchet irradianism tu munite the sains and si friction device 1to-bear against said bevel gear to hold the l the other half on said hub on opgosite sides same inv action during idle strokes of the lever and ratchet parts.

2. In lifting j aeks, a tubular standard having guide ehannels lengthwise therein, a lift screw having projections engaged in said guides and a eombined adjusting nut and gear mounted on said screw on top of said standard and adapted to be freed therefrom, whereby said serew and nut ean be bodily lifted together by hand for adjustment by hand, in eombiiiation with an aetuating gear meshing with the aforesaid gear and a headed spindle on which said actuating gear is mounted, a friction tightening spring between said gear and the head on the spindle carrying the Same, and means to aetuate said actuating gear. Y

3. lnliiting jacks, a standard having an annular' ness at its side and top, a headed spindle screwed into said boss, and an aetuating bevel gear mounted on said spindle/and having ahuhat one side corresponding to said boss, in eonzbination with a divided hand e having one hall' mounted on said boss and of said gear, and a friction retar ing spring on sald spindle engaging said gear.

4. ln lifting Jacks, .a tubular standard having a right angled spindle aflixed thereto, a :j

bevel gear sleeved on Vsaid spindle and a lever and pawl member mounted upon said standard and gear and adapted to operate the same, and a split spring washer engaged between a lixed part of said standard and said gear to retard its movement, in combination with a screw slidably mounted within said tubular standard and )rovided with means to prevent rotation therein, and a `bevel gear threaded upon said screw and adapted to rest upon the top of said standard and mesh with said other gear and adapted to be freed therefrom by bodily lifting said serew and its gear for individual adjustment.

ln testimonyY whereof l sign this speeiiieation in the presence oi Vtwo witnesses.

JOHN il. BURKHOLDER. Witnesses:

E. M. FISHER, F. C. MUssUN.' 

